Scaffold-supporting means.



E. H. HENDERSON.

SOAFFOLD SUPPORTING MEANS.

APPLICATION IILBD MAR. 12, 1910.

1 ,O35,702, Patented Aug. 13, 1912.

2 BHEBTB-BHEET 1.

MUTIIEHS @WW EH E. H. HENDERSON.

SCAFFOLD SUPPORTING MEANS.

APPLICATION FILED MAR. 12, 1910.

1,035,702, Patented Aug.13,1912.

2 SHEETS-SHEET 2.

Wfinesses: hventur' Elias H. HendersunI 1 15 I $MK W Q M? ported inplace at the side Fig. 2 is a side view of the scaffold shown in UNITEDSTATES PATENT OFFICE.

ELIAS H. HENDERSON, OF CHICAGO, ILLINOIS, AS SIGNQR, BY MESNEASSIGNMENTS, TO HENDERSON SCAFFOLD HOIST COMPANY, OF CHICAGO, ILLINOIS,A CORPORA- TION OF ILLINOIS.

SGAFFOLD-SUPPORTING MEANS.

Specification of Letters Patent.

Application filed March 12, 1910.

Patented Aug. 13,1912 Serial N0. 548,952. I

vof Illinois, have invented certain new and useful Improvements inScaffohLSupporting Means, of which the following is a full, clear,concise, and exact description, reference being had to the accompanyingdrawings, forming a part of this specification.

My inventlon relates to an improved form of scaffold supportingmechanism by which the supportin means is also adapted to move the seaold any desired height on a building. 1

My invention consists essentially of an improved form of Windlassconstruction in which the number of operating parts is reduced to aminimum and which -is so made as to receive scaffold supporting memberswithout the use of fastening devices such members being lald in place inthe frames of the Windlass and held' in proper position thereon by thecombined weight of such members and the scaffold supported thereby.

The several drawings illustrating my invention are as follows:

Figure 1 is an end view of a scaffold supof a building.

Fig. 1. Fig. 3 is a detail sectional view of the drum of one of thewindlasses showing the construction of the operating lever. Fig. 4 is aview similar to Fig. 3 showing a modified form of operating lever. Fig.5 is a side view of a modified form of scaffold known'as a paintersscaffold. Fig. 6, is a sectional view of the scaffold shown in Fig.

5 taken along the line 6-6.

Similar numeralsrefer to similar parts throughout the several views.

4 As shown in Fig. 1, the scaffold consists of a plurality of supportingmembers 1 upon which the floor planks 2 are supported. Each of themembers 1 is supported at each of its ends by the frame 3 of one of thewindlasses which frame is bent in the form of a loop at its lowerportion and supports between its upwardly extending ends a drum 4 upon ashaft 5. The loop formed in the lower portion of the frame 3 is of sucha size as to fit the end of the member 1 vhich member is preferably ofmetal, as

' iron or steel, and bent at its end to engage the frame 3 and preventthe frame from slipping off the end of such member. The ends of themembers 1 may benotched as indicated to assist in retaining the frames 3in. proper position upon such members. The heads of the drum 4haveformed thereon ratchet wheels 6 engaged by spring pawls 7 carried bya rod 8 supported by the upper ends=of the sides of the frame 3..carries a small sheave 9.

The rod 8 also around which the cable 10 is led from the drum t to anoutrigger 11 supported from the upper portion of the building 12. Oneend of the drum 4 has formed thereon, as indicated in Figs. 1, 3 and 4,an internal ratchet 13 engaged by the end of a lever 14 which issupported by the shaft 5 between the end of the drum and the frame 3.The lever 14 is provided near its engaging end with a slot 15 whichpermits such lever 14 to slide sufficiently upon the shaft 5 to, engageor disengage the teeth of'the ratchet wheel 13. Thus when the leveristraised the pointed end which is normally in en agement with the teethof the ratchet wheel 13 slips by the teeth one after another untilpressure is exerted in a downward direct-ion upon the end of the leverwhich-pressure serves not only to move the lever about the shaft 5 butalso to move the lever longitudinally so as to bring its shorter endinto engagement with one of the teeth of the ratchet wheel 13. A pipe 15may he slipped over the longer end of the lever 14, it desired, toafford a greater leverage than could be had by the lever let alone. Thisis done principally for convenience in order that the lovers 14 may notbe in the way of workmen upon the scaffold. The lever 14, shown in Fig.3, has formed upon its left hand end a boss 14 extending into'theinternal ratchet wheel 13 thus affording engagement bet-ween the shorterend of the lever 14; and such ratchet. wheel. In the modification shownin Fig. 1 the same result is secured by bond ing the end of the lever 14as indicated at 14." so that it is brought into engagement' with theteeth of the ratchet wheel 13. As the cable 10 is wound upon the drum 4and unwound therefrom, the sheave 9 not only rotates upon tne rod 8, butalso moves longitudinally thereonto continuously guide the cable 10 in adirection to prevent displacement of the Windlass,

thus insuring that'it always remains in a practically vertical position.The pawls 7 are provided in duplicate, one in connection with each headof the drum 4 as a precautionary feature so that if, for any reason, onefails, the other may prevent accident.- Obviously engaging the internalratchet wheel 13 by the lever 14 in its lOWGB POSIlZIO II and thenremoving the pawlsZfrom engagement with the drum 4, the scaifol may belowered as desired.

- The win a s construct-ion shown in Figs. 5.and 6 is similar to thatalready described with-the exception that the frame 3* is twisted at itslower end through practically 90 degrees so that the portion 3 is in aposition to engage a supporting member 16 extending transversely of thescaffold 17, while the drum of the Windlass .and its supporting shaftalso extend transversely of the scaffold. This is done in order that theoperat mg levers 14 may extend over the body Jortion of the scaffold.instead of sidewise rom the scaffold as would otherwise be the case.

This form of scafiold is what is commonly.

indicated at 18 to prevent displacement of such members relatively tothe scaifold while the frames 3? of the windlasses are held in placeupon the supporting members 16 by means of the floor of the scaffold asindicated.

Wh le I have shown my invention in the particular embodiments hereindescribed, I do not, however, limit myself to these constructions, butdesire to claim any equivalents that maysuggest themselves to thoseskilled in the art.

What I claim is:

1. In a scaflold support, the combination of a Windlass frame comprisinga U-shaped bar of metal twisted so that its lower portion is atsubstantially right angles with its upper portion, a supporting memberremovably carried by the U-shaped bar and formed at its end to preventrelative vdisplacement between the member and the bar,

and hoisting mechanism carried by the,

Windlass frame.

2. In a scaffold support, the combination of a Windlass frame comprisingaibent bar of metal twisted below nism so that the lower portion of theframe is at substantially right angles with its upper portion, ascaffold supporting member removably carried by the lower portion, of

the Windlass frame, and hoisting" mecha-' I nism carried by the upperportion of said Windlass frame.

3. In a Windlass, the combination of a frame comprising a U-shaped barof metal twisted so that the opening through its lower portion extendsat substantially right angles with the opening through its upperportion, and hoisting mechanism carried by the Windlass frame In witnesswhereof, Thereunto. subscribe my name this 8th day of March, AT D. 1910.

ELIAS HENDERSON.

Witnesses:

ALBERT O. -BELL, ALBERT G. MOCALEB.

the hoisting mecha-

